When it comes to Kate Middleton, the Duchess of Cambridge, there's one thing no one can deny: the woman loves blue. From the second Prince William and Kate Middleton's engagement was announced, the royal has arguably stepped out in more of the aquatic shade than any other color. Of course, a woman as gorgeous as the Duchess could wear a paper bag and still look flawless, but regardless, there's no doubting that, well, she has the blues.

Seriously! From that iconic engagement dress to the most beautiful blue ballgown we've ever seen -- check out Kate Middleton's 6 best blue looks: